Rasarnava 7.2

7.2

śrībhairava uvāca
mākṣiko vimalaḥ śailaś capalo rasakastathā
sasyako daradaścaiva srotoñjanam athāṣṭakam
aṣṭau mahārasāścaivam etān prathamataḥ śṛṇu //

The venerable Bhairava said:
Pyrite, vimala, bitumen, capala, calamine,
blue vitriol, cinnabar, and stibnite make eight;
such are the eight primary minerals; listen to them first.